Backlight Apparatus and Liquid Crystal Display Apparatus

1. A backlight apparatus comprising: a light guide plate having an inputting surface and an outputting surface that is opposite a rear surface of a liquid crystal panel; a plurality of light emitting diodes placed in proximity to the inputting surface; and a current supplying section that supplies to the plurality of light emitting diodes a current that causes the plurality of light emitting diodes to emit light that illuminates the liquid crystal panel via the light guide plate, wherein the current supplying section supplies a lower current to a light emitting diode placed in proximity to a part having a higher ambient temperature within the inputting surface and the supplied current is adjusted according to a video input signal.

2. The backlight apparatus according to claim 1 , wherein: the inputting surface includes a pair of end surfaces; and the current supplying section supplies a lower current to a light emitting diode placed in proximity to a surface having a higher ambient temperature of the pair of end surfaces.

3. A backlight apparatus that is used in a liquid crystal display apparatus having a liquid crystal panel and a liquid crystal driver driving the liquid crystal panel, the backlight apparatus comprising: a light guide plate having an inputting surface and an outputting surface that is opposite a rear surface of the liquid crystal panel; a plurality of light emitting diodes placed facing the inputting surface; and a current supplying section that supplies to the plurality of light emitting diodes a current that causes the plurality of light emitting diodes to emit light that illuminates the liquid crystal panel via the light guide plate, wherein the current supplying section supplies a lower current to a light emitting diode placed nearer the liquid crystal driver and the supplied current is adjusted according to a video input signal.

4. The backlight apparatus according to claim 3 , wherein: the inputting surface includes a pair of end surfaces; and the current supplying section supplies a lower current to a light emitting diode placed in proximity to a surface nearer the liquid crystal driver of the pair of end surfaces.

5. The backlight apparatus according to claim 4 , wherein: the liquid crystal panel has a display screen; the liquid crystal driver is placed in proximity to a lower edge of the liquid crystal panel in a vertical direction of the display screen; the pair of end surfaces include an upper surface and lower surface in the vertical direction; and the power supply section supplies a lower current to a light emitting diode placed in proximity to the lower surface than to a light emitting diode placed in proximity to the upper surface.

6. The backlight apparatus according to claim 1 , wherein a light emitting diode to which a lower current is supplied is placed with higher density adjacent to another light emitting diode.

7. The backlight apparatus according to claim 1 , wherein: the liquid crystal panel has a display screen; and the light guide plate has a diffusion pattern that makes brightness uniform over an entire area of the display screen.

8. The backlight apparatus according to claim 1 , wherein the current supplying section adjusts a current supplied to all of the plurality of light emitting diodes according to a calorific value of a liquid crystal driver that drives the liquid crystal panel based on the video input signal to the liquid crystal driver.

9. The backlight apparatus according to claim 1 , further comprising a detecting section that detects a temperature of a liquid crystal driver that drives the liquid crystal panel, wherein the current supplying section adjusts a current supplied to all of the plurality of light emitting diodes according to a detected temperature.

10. A liquid crystal display apparatus comprising: the backlight apparatus according to claim 1 ; and a liquid crystal panel that transmits light emitted from the backlight and emits the transmitted light from a front surface of the liquid crystal panel.